<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <div>aaa</div>
    <!-- 注意：行内块元素不要设置上下 padding，会导致覆盖其他元素 -->
    <span style="background-color: pink; padding: 30px;">xxx</span>
    <span>nnn</span>
    <div>bbb</div>
</body>
</html>